Texas Instruments LMH6622MA

Overview

LMH6622MA from Texas Instruments is a dual wideband, low-noise voltage-feedback operational amplifier optimized for DSL receive pre-amplification. It delivers 160 MHz bandwidth (AV = +2), 1.6 nV/√Hz input voltage noise, 85 V/μs slew rate, and −90 dBc 2nd harmonic distortion at 1 MHz - enabling high-fidelity signal recovery in xDSL analog front ends.

For engineers reviewing the LMH6622MA datasheet, LMH6622MA pinout, LMH6622MA application, or LMH6622MA equivalent, this page provides verified specifications, SOIC-8/VSSOP-8 package mapping, dual-channel receive-path design context, and validated alternative options for ADSL/VDSL receiver circuits requiring low-noise, high-linearity amplification with ±2.5 V to ±6 V or +5 V to +12 V supply flexibility.

Technical Context

The LMH6622MA employs a voltage-feedback architecture with stable operation for closed-loop gains ≥ +2 or ≤ −1. Its VIP10 process enables simultaneous high bandwidth and low noise - critical for resolving dense DMT tone clusters in 100 kHz–1.1 MHz ADSL receive bands while maintaining >90 dBc harmonic suppression.

It supports both single-supply (+5 V to +12 V) and split-supply (±2.5 V to ±6 V) configurations, with input common-mode range extending to −4.75 V and +5.7 V under ±6 V operation. The dual-channel layout allows independent channel gain setting and hybrid coupler functionality via inverting summing configuration.

Key Specifications

Pinout & Package

LMH6622MA is available in 8-pin SOIC (D package, 4.90 mm × 3.91 mm) and 8-pin VSSOP (DGK package, 3.00 mm × 3.00 mm). Both packages share identical pinout and electrical characteristics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise, wideband operational amplifier applications.

Compared with LMH6622MA, LMH6624MA trades higher power for superior noise performance, while OPA2835IDGKT sacrifices bandwidth and DSL-specific linearity to achieve ultra-low quiescent current - making LMH6622MA the optimal balance for xDSL receive channels demanding both noise and distortion control.

Availability

LMH6622MA is available at Aetrix Electronics and suitable for xDSL modem design, ultrasound imaging front ends, broadband active filtering, and cellular base station IF amplification requiring stable component supply and long-term production continuity.

Supply support for LMH6622MA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in high-performance op-amps and communications ICs.

The LMH6622MA belongs to TI's LMH high-speed amplifier product line, engineered specifically for broadband communications infrastructure - emphasizing low noise, high linearity, and robust operation in DSL, medical imaging, and test equipment signal chains.

FAQ

What is the minimum supply voltage for LMH6622MA in dual-supply mode?

The LMH6622MA operates in dual-supply mode from ±2.5 V to ±6 V. At ±2.5 V, it maintains 150 MHz bandwidth, 80 V/μs slew rate, and −88 dBc HD2 performance - sufficient for low-voltage DSL implementations where thermal or power constraints limit higher rails. Full specification compliance is guaranteed across this range.

Does LMH6622MA support single-supply operation, and what is the input common-mode range in that configuration?

Yes, LMH6622MA supports single-supply operation from +5 V to +12 V. With V− tied to ground, the input common-mode voltage range extends from −1.25 V to +2.2 V (at ±2.5 V equiv.) - allowing AC-coupled inputs with appropriate biasing. This enables use in +5 V systems interfacing to transformer-coupled telephone lines.

Can LMH6622MA be used as a hybrid coupler in ADSL designs, and how is cancellation achieved?

Yes, LMH6622MA is explicitly designed for hybrid coupler function in ADSL receive paths. Using its dual channels in an inverting summing configuration (e.g., Figure 36), driver leakage is canceled by matching R1 = 2×R2. This exploits superposition to null the transmit signal at the output while preserving received signal integrity - a key feature confirmed in TI's application note SNOS986E.

What is the maximum output current capability of LMH6622MA, and under what conditions is it specified?

LMH6622MA delivers ±90 mA linear output current per channel, specified at VO = ±4.3 V (for ±6 V supplies) and VO = ±0.8 V (for ±2.5 V supplies). This enables direct driving of 100 Ω ADC input networks or active filter loads without external buffers - verified in Electrical Characteristics tables under IOUT parameter.

How does LMH6622MA perform in terms of multitone power ratio (MTPR) for ADSL applications?

LMH6622MA achieves −78 dBc upstream MTPR (26–132 kHz) and −70 dBc downstream MTPR (144 kHz–1.1 MHz) at ±6 V, meeting full-rate ADSL DMT spectral purity requirements. These values are measured per Figure 33 in SNOS986E using RF = 500 Ω, RG = 174 Ω, RL = 437 Ω - confirming its suitability for production CPE designs.